Operating Voltage: 2.5-5.5 V Sonar Sensing Range: 15-645 cm Max. Sensing Range: 645 cm Read Rate: 20 Hz Frequency: 42 KHz Features : Read from all 3 sensor outputs: Analog Voltage, RS232 Serial, Pulse Width Virtually no sensor dead zone, objects closer than 6 inches range as 6 inches Maximum Range of 254 inches (645 cm) Small, lightweight module Designed for easy integration into your project or product The narrowest beam of the LV-MaxSonar-EZ sensors Best for large object detection applications Package Includes: 1 x MB1040 LV-MaxSonar-EZ4 Ultrasonic Sensor Sonar Module||Maximum Range of 254 inches (645 cm);The narrowest beam of the LV-MaxSonar-EZ sensors;Best for large object detection applications